Safer $apply for angular, suppress $digest already in progress error

safeApply.js

angular.module('myApp', [])
  .run(function ($rootScope, $exceptionHandler) {
    $rootScope.$safeApply = function (exp) {
      var phase = (this.$root || this).$$phase
      if (phase !== '$apply' && phase !== '$digest') {
        this.$apply(exp)
      } else {
        try {
          this.$eval(exp)
        } catch (ex) {
          $exceptionHandler(ex)
        }
      }
    }
  })